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Bartlesville

(Encyclopedia)Bartlesville bärˈtəlzvĭl [key], city (2020 pop. 37,290), seat of Washington co., NE Okla., on the ...

Gold Butte National Monument

(Encyclopedia)Gold Butte National Monument, 296,937 acres (90,506 hectares), SE Utah, est. 2016 and managed by the Bureau of Land Management. Named for a mining ghost town, the monument embraces a rugged desert lan...

Flammarion, Camille

(Encyclopedia)Flammarion, Camille kämēˈyə flämäryôNˈ [key], 1842–1925, French astronomer and author. He served for some years at the Paris Observatory and the Bureau of Longitudes, and in 1883 he set up a...

Hofstadter, Robert

(Encyclopedia)Hofstadter, Robert, 1915–90, American physicist, b. New York City, Ph.D. Princeton, 1938. He taught at Princeton from 1938 to 1950 and also worked at the National Bureau of Standards during World Wa...

Abbe, Cleveland

(Encyclopedia)Abbe, Cleveland ăbˈē [key], 1838–1916, American meteorologist, b. New York City; brother of Robert Abbe. He was the first official daily weather forecaster in the United States. Abbe studied astr...

fugitive slave laws

(Encyclopedia)fugitive slave laws, in U.S. history, the federal acts of 1793 and 1850 providing for the return between states of escaped black slaves. Similar laws existing in both North and South in colonial days ...

Rayleigh, John William Strutt, 3d Baron

(Encyclopedia)Rayleigh, John William Strutt, 3d Baron rāˈlē [key], 1842–1919, English physicist. He was professor at Cambridge (1879–84) and at the Royal Institution (1887–1905), and chancellor of Cambridg...

War Department, United States

(Encyclopedia)War Department, United States, federal executive department organized (1789) to administer the military establishment. It was reconstituted (1947) as the Dept. of the Army when the military administra...

Eaton, John

(Encyclopedia)Eaton, John, 1829–1906, American educator, b. Sutton, N.H., grad. Dartmouth, 1854. After serving as a school principal in Cleveland, Ohio, and as superintendent of schools in Toledo, he enrolled at ...

margin requirement

(Encyclopedia)margin requirement, that part of a security's price that a buyer must pay for in cash. The balance of the price is met by the broker, who, in effect, is supplying a client with a loan. The smaller the...